Thanks Anand. I just opened a new incident in SAP
I wanted to know if this was bug-related issue within SUM, so I downloaded SUM 1 SP15 PL8 and started a new Upgrade on a different host, and bumped with the same error.
Tried to see program RSPTBFIL and error seems to be located in table PUTTB_SHD, where it writes information about shadow tables, but not sure what is wrong?
I hope Christiane can help me out since is the author of the program.